James W Yee

US Patent:

7099340, Aug 29, 2006

Filed:

Oct 24, 2001

Appl. No.:

10/033383

Inventors:

Valentino Liva - Los Altos CA, US
Alok Sharma - San Jose CA, US
Lance Smith - San Jose CA, US
James Yee - Union City CA, US

Assignee:

Juniper Networks, Inc. - Sunnyvale CA

International Classification:

H04L 12/28
H04L 12/56
H05K 5/00
H05K 7/00

US Classification:

370401, 361679

Abstract:

A Cable Modem Termination System (CMTS) is partitioned into Line Cards, I/O Cards, and a midplane to provide enhanced Reliability, Availability, and Serviceability. Each I/O Card provides a cabling interface for coupling an assigned Line Card to other portions of a Hybrid-Fiber-Coax Network. A plurality of RF signals is coupled via connectors between each Line Card and a corresponding I/O Card, via the midplane. This permits a Line Card to be removed for servicing without requiring recabling of the corresponding I/O Card. Preferably, a rectangular-multi-pin collinear connector-cascade (Line Card jack, midplane double-plug, and I/O Card jack) is used to couple the plurality of RF signals. The connector-cascade is configured with protective RF ground pins adjacent and surrounding each of a plurality of RF signal pins. This approach permits each Line Card to be removed or inserted in a single action, without attention to individual RF interconnects, yet meets all system RF requirements while using relatively inexpensive connectors. The I/O Cards preferably include a distributed backup bus that permits one of the Line Cards in the CMTS to serve as a designated backup.

US Patent:

7149223, Dec 12, 2006

Filed:

Oct 24, 2001

Appl. No.:

10/033378

Inventors:

Valentino Liva - Los Altos CA, US
Alok Sharma - San Jose CA, US
Lance Smith - San Jose CA, US
James Yee - Union City CA, US

Assignee:

Juniper Networks, Inc. - Sunnyvale CA

International Classification:

H04N 7/173
H04B 1/38

US Classification:

370401, 370485, 725149

Abstract:

Enhanced Cable Modem Termination System (CMTS) functionality, including programmable digital domain modulators and demodulators for dynamic channel assignment, is incorporated into Fiber Nodes (FNs) or mini Fiber Nodes (mFNs), yielding enhanced Fiber Nodes (eFNs). These eFns distribute CMTS functionality deep into Hybrid-Fiber-Coax Networks (HFCN) rather than centralizing the CMTS functions within a single location. Moving the cable modem terminations closer to the subscribers shortens the analog RF paths required to support cable modems. Communication of both subscriber data and CMTS control data is performed over Ethernet-compatible packet networks between the field-based CMTSs and an upstream facility (e. g. , the Head End), which includes an Internet gateway. Packet data for multiple subscriber cable modems is easily compressed and merged over common network paths, reducing cabling plant complexity and increasing bandwidth utilization.

US Patent:

7599671, Oct 6, 2009

Filed:

Dec 9, 2005

Appl. No.:

11/298017

Inventors:

Milind Kopikare - Sunnyvale CA, US
Hui Yao Lin - Fremont CA, US
James Yee - Fremont CA, US
Chuong Vu - San Jose CA, US

Assignee:

Marvell World Trade Ltd. - St. Michael

International Classification:

H04B 17/00
H04B 7/00

US Classification:

455130, 455 6713, 4552321, 4552261, 455296

Abstract:

A wireless network device includes a signal receiving module that receives an RF signal, and a signal processing module that includes an automatic gain control (AGC) module and that generates control signals when a gain of the AGC module changes based on the RF signal. The network device includes a control module that selectively measures N time intervals between one of adjacent and non-adjacent control signals, wherein N is an integer greater than 1, and that selectively determines that the RF signal is a radar signal when the N time intervals are substantially equal.

US Patent:

7623532, Nov 24, 2009

Filed:

Oct 27, 2006

Appl. No.:

11/553882

Inventors:

Valentino Liva - Los Altos CA, US
Alok Sharma - San Jose CA, US
Lance Smith - San Jose CA, US
James Yee - Union City CA, US

Assignee:

Juniper Networks, Inc. - Sunnyvale CA

International Classification:

H04L 12/56
H04N 7/00

US Classification:

370401, 370486, 725127, 725148

Abstract:

Enhanced Cable Modem Termination System (CMTS) functionality, including programmable digital domain modulators and demodulators for dynamic channel assignment, is incorporated into Fiber Nodes (FNs) or mini Fiber Nodes (mFNs), yielding enhanced Fiber Nodes (eFNs). These eFns distribute CMTS functionality deep into Hybrid-Fiber-Coax Networks (HFCN) rather than centralizing the CMTS functions within a single location. Moving the cable modem terminations closer to the subscribers shortens the analog RF paths required to support cable modems. Communication of both subscriber data and CMTS control data is performed over Ethernet-compatible packet networks between the field-based CMTSs and an upstream facility (e. g. , the Head End), which includes an Internet gateway. Packet data for multiple subscriber cable modems is easily compressed and merged over common network paths, reducing cabling plant complexity and increasing bandwidth utilization.

US Patent:

7623537, Nov 24, 2009

Filed:

Jun 21, 2006

Appl. No.:

11/425612

Inventors:

Valentino Liva - Los Altos CA, US
Alok Sharma - San Jose CA, US
Lance Smith - San Jose CA, US
James Yee - Union City CA, US

Assignee:

Juniper Networks, Inc. - Sunnyvale CA

International Classification:

H04L 12/28
H04L 12/56
H05K 5/00

US Classification:

370419, 700100, 361679

Abstract:

A network device and system are provided. The network device may include a chassis configured to receive a line card and an input/output (I/O) card that operatively connects to a network via cabling. The chassis may include a bus structure. The bus structure may include an I/O interface to couple to a chassis interface of the I/O card, and a line card interface to couple to a chassis interface of the line card using a connector away that includes at least one RF conductor which may be associated with a set of connectors configured to shield the at least one RF conductor.

US Patent:

7953125, May 31, 2011

Filed:

Jul 9, 2009

Appl. No.:

12/500483

Inventors:

Valentino Liva - Los Altos CA, US
Alok Sharma - San Jose CA, US
Lance Smith - San Jose CA, US
James Yee - Union City CA, US

Assignee:

Juniper Networks, Inc. - Sunnyvale CA

International Classification:

H04J 99/00

US Classification:

370546, 439 92, 43960705

Abstract:

A Cable Modem Termination System (CMTS) is partitioned into Line Cards, I/O Cards, and a midplane to provide enhanced Reliability, Availability, and Serviceability. Each I/O Card provides a cabling interface for coupling an assigned Line Card to other portions of a Hybrid-Fiber-Coax Network. A plurality of RF signals is coupled via connectors between each Line Card and a corresponding I/O Card, via the midplane. This permits a Line Card to be removed for servicing without requiring recabling of the corresponding I/O Card. Preferably, a rectangular-multi-pin collinear connector-cascade (Line Card jack, midplane double-plug, and I/O Card jack) is used to couple the plurality of RF signals. The connector-cascade is configured with protective RF ground pins adjacent and surrounding each of a plurality of RF signal pins. This approach permits each Line Card to be removed or inserted in a single action, without attention to individual RF interconnects, yet meets all system RF requirements while using relatively inexpensive connectors. The I/O Cards preferably include a distributed backup bus that permits one of the Line Cards in the CMTS to serve as a designated backup.

US Patent:

8041317, Oct 18, 2011

Filed:

Oct 5, 2009

Appl. No.:

12/573361

Inventors:

Milind Kopikare - Sunnyvale CA, US
Hui Yao Lin - Fremont CA, US
James Yee - Fremont CA, US
Chuong Vu - San Jose CA, US

Assignee:

Marvell World Trade Ltd. - St. Michael

International Classification:

H04K 3/00
H04B 17/00
H04B 1/06
H04B 7/00

US Classification:

455130, 455 1, 455 6711, 455136, 4552341, 342 73, 342 92

Abstract:

A system includes a radio frequency transceiver. A baseband processor includes an automatic gain control module. The automatic gain control module has a gain that changes from and subsequently returns to a predetermined value each time the radio frequency transceiver receives a radio frequency signal. The baseband processor is configured to selectively generate an interrupt signal each time a radio frequency signal is received based on a magnitude of the change in the gain of the automatic gain control module and a length of time in which the gain returns to the predetermined value. A control module is configured to identify a radio frequency signal received by the radio frequency transceiver as a radar signal in response to the baseband processor having generated a plurality of interrupt signals at substantially equal time intervals.

US Patent:

8126145, Feb 28, 2012

Filed:

Feb 21, 2006

Appl. No.:

11/359944

Inventors:

Claudius Tewari - Sunnyvale CA, US
Brian Bosso - San Jose CA, US
Chor-Teck Law - San Jose CA, US
Heng-Jui H. Hsu - San Jose CA, US
James Chieh-Tsung Chen - Santa Clara CA, US
James Chih-Shi Yee - Fremont CA, US

Assignee:

Marvell International Ltd. - Hamilton

International Classification:

H04L 12/54

US Classification:

380255, 370401, 370412, 370428

Abstract:

The invention relates to a method for associating a client with an access point using a security protocol. The method may include initiating a handshake and exchanging operational information between the access point and the client, establishing an encrypted operational key if the operational information is validated and entering an operational phase using the operational key and an unique service set identifier if valid.